In This Issue • June 15, 2017

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Veterinarians have high debt and low starting salaries for their level of education, and the AVMA wants congressional relief for what the Association sees as an unsustainable trend. In other news, a candidate for AVMA president-elect describes his goals, including making the AVMA a household name.

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Letters to the Editor

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What Is Your Diagnosis?

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What Is Your Neurologic Diagnosis?

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Diagnostic Imaging in Veterinary Dental Practice

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ECG of the Month

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Anesthesia Case of the Month

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Pathology in Practice

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perspectives in professional education

Evaluation of pyramid training as a method to increase diagnostic sampling capacity during a swine disease outbreak

Pyramid-based instruction wherein a single swine veterinarian trained 2 or 3 participants and each of those participants, in turn, trained additional individuals may be a feasible way to rapidly increase diagnostic sampling capacity during an emergency veterinary response to a swine disease outbreak.

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Book Reviews

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Small Animals

Serum antibody titers against canine distemper virus and canine parvovirus in dogs hospitalized in an intensive care unit

Vaccination of dogs against canine distemper virus and canine parvovirus is reportedly quite common. However, in a study of 80 dogs hospitalized in an intensive care unit for > 12 hours, only 40 (50%) were seropositive (serum neutralization titer > 1:32) for antibodies against CDV and 65 (81%) were seropositive (hemagglutination inhibition titer > 1:80) for antibodies against CPV. Ten dogs were seronegative for antibodies against both CDV and CPV. Although the antibody titer necessary to prevent disease caused by CDV or CPV in critically ill dogs is unknown, results indicated that adherence to infectious disease control guidelines is warranted when CDV- or CPV-infected dogs are treated in an ICU.

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Open reduction and plate fixation of fractures involving the distal aspect of the radius and ulna in miniature- and toy-breed dogs

High postoperative complication rates have been reported following open reduction and plate fixation of fractures involving the distal aspect of the radius and ulna in smaller dogs; however, many of those reports involved low numbers of dogs. In a new review of medical records for 102 miniature- and toy-breed dogs (105 fractures) weighing ≤ 7 kg (15.4 lb) that underwent open reduction and cranial bone plate fixation of a fracture involving the distal aspect of the radius and ulna, complications developed in 26 (25%) fractures (23 [22%] minor and 3 [3%] major complications). At last follow-up examination (typically 6 weeks after surgery), 97 (95%) dogs had no signs of lameness; minor lameness was identified in 5 (5%) dogs.

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Thyrotoxicosis induced by excessive 3,5,3′-triiodothyronine in a dog

A 7-year-old Havanese was evaluated at a veterinary teaching hospital because of a 12-week history of hyperactivity, aggression, and progressive weight loss. Serum 3,5,3′-triiodothyronine and free T3 concentrations were high, and serum thyroxine, free T4, and thyroid-stimulating hormone concentrations were normal or low. Analysis of the commercial beef-based canned food the dog was being fed revealed a high concentration of T3 (1.39 μg/g) and an iodine (82.44 μg/g) concentration that exceeded industry recommendations. This case highlights the importance of measuring serum T3 and TSH concentrations in addition to T4 and free T4 concentrations when there is incongruity between clinical findings and thyroid function test results.

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A model for predicting risk factors for high SeM-specific antibody titers after natural outbreaks of Streptococcus equi subsp equi infection in horses

Anecdotal expert opinion has suggested that horses with SeM-specific antibody titers ≥ 3,200 should not be vaccinated against Streptococcus equi subsp equi because of the risk for development of purpura hemorrhagica. A case-control study involving 245 horses (57 horses involved in strangles outbreaks and 188 healthy horses) was performed in an effort to develop a model to predict whether horses would have an SeM-specific antibody titer ≥ 3,200 after a naturally occurring outbreak of S equi subsp equi infection. Farm size > 20 horses, history of clinically evident disease, and male sex were associated with having a titer ≥ 3,200. Although the model had low specificity, findings suggested that it might be a good screening tool prior to vaccination.

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